Specification:

BT: V4.1
Frequency Range: 2.4GHz
Bluetooth Protocol:A2DP/AVRCP/ HFP 

Operation Range: Up to approximately 10m

Bluetooth Range: Up to 10m 
Speaker Size:40mm
Speaker Channels: Stereo
Speaker Watts:0.3W 
Max Speaker Output:0.5db 
Impedance Load:32ohm
Battery Type: Rechargeable non-replaceable Lithium 
Battery Capacity:300mAh
Talk/Play Time: Up to 12 Hours 
Standby Time: Up to 150 Hours 
Charging Minimum Requirement:5v/100mAh (0.1A) 
Charging Maximum Requirement:5V/1000mAh (1A) 
Approximate Weight:250g